Orifice cleaning instrument



FIG. 1 is a perspective view of an orifice cleaning instument in accordance with the present design;

FIG. 2 is a front horizontal elevation view thereof;

FIG. 3 is a rear horizontal elevational view thereof;

FIG. 4 is a side elevational view thereof, the opposite side view being a mirror image thereof;

FIG. 5 is an end view taken from the working end, i.e. the right-hand end as viewed from FIGS. 1, 2 and 4; and,

FIG. 6 is an opposite end view thereof. 

The ornamental design for an orifice cleaning instrument, as shown and described. 